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Guest co-host Lisa Ling; actress Billie Lourd; comic Chelsea Handler.

Sheldon takes his first engineering class with Professor Boucher; Meemaw and Dale help take care of his ex-wife, June.

Darlene isolates herself from her co-workers at Wellman Plastics, leaving them with the impression she is an elitist snob; Louise decides to teach Harris an expensive life lesson; Jackie is determined to keep the restaurant running.

Afia Amoako serves delicious Ghanaian meals.

Katie sets her sights on a new addition for Logan; R.J. and Zende begin collaborating on the new Electra line.

It's Beverly Rose's first birthday, but it's not all cake and candles as Becky and Emilio disagree on what kind of party they should have; Jackie is introduced to someone who wants to be more than friends.

Bernadette runs into her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz.

Sheldon takes acting lessons from Penny in hope of becoming a better teacher; Koothrappali fantasizes about his friend's girlfriend.

CTV News covers stories that matter to Canadians - locally, nationally, & internationally.

CTV News covers stories that matter to Canadians - locally, nationally, & internationally.

CTV News covers stories that matter to Canadians -- locally, nationally and internationally.

Four contestants from different generations; Baby Boomer, Gen X, Millennial, and Gen Z face-off through multiple rounds of pop culture trivia.

Analysis of tonight's matchup and latest news from around the league.

The Green Bay Packers host the Atlanta Falcons at Lambeau Field as NFL Week 3 action continues. The Packers beat the Jets 20-17 behind placekicker Trey Smack's OT kick, while the Falcons seek to end a two-game skid after falling 34-3 to the Panthers.

CTV News covers stories that matter to Canadians - locally, nationally, & internationally.

CTV News covers stories that matter to Canadians -- locally, nationally and internationally.

Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.

Actor Kenan Thompson; actress Sandra Hüller.